Vocabulary

Sorry, none are available.

Outline

Devices that Monitor Faults

• Creep Meters
  • uses wire
  • weight slides on wire
  • measures horizontal movement
• Laser-Ranging Device
  • uses a laser beam
  • laser beam gets even the tiniest movement of an earthquake
  • device may get change in distance also
• Tiltmeter
  • measures the tilt in the ground
  • sees the land rise or sink down
  • liquid will flow from one bulb to another
• Satellite Monitors
  • gets the images from radar
  • satellite jumps the radio waves away from the ground
  • see tiny changes in elevation

Monitoring Risk in the United States

• know the fault's location and where past earthquakes had been
• risk is big along the Pacific in California, Washington, and Alaska
• Rockies have very unlikely giant earthquakes